Speaker unit and portable information terminal

A loudspeaker and magnetic yoke technology, applied in the field of loudspeaker units and portable information terminals, can solve the problems of difficulty in increasing the sound pressure of the loudspeaker unit and the limitation of the enlargement of the magnetic body, and achieve the effects of increasing the sound pressure, realizing miniaturization, and improving the magnetic efficiency.

Inactive Publication Date: 2011-11-16
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the mounting portion is provided on the yoke, the size of the magnetic body is limited due to the space for the mounting portion, the space for engaging th

Method used

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  • Speaker unit and portable information terminal
  • Speaker unit and portable information terminal
  • Speaker unit and portable information terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] First, the structure of the speaker unit of this embodiment will be described.

[0031] figure 1 It is a schematic cross-sectional view showing the structure of the speaker unit in Embodiment 1 of the present invention. figure 2 yes figure 1 A simplified top view of the loudspeaker unit shown. It should be noted that, in figure 2 In FIG. 2 , the vibration plate and the frame cover are not shown for easy observation. along figure 2 A brief cross-sectional view of the I-I line is figure 1 .

[0032] refer to figure 1 and figure 2 , The speaker unit of this embodiment mainly includes a yoke 1 , a magnet member 2 , a coil 3 , a diaphragm 4 , a frame 5 , a frame cover 10 , and a protrusion 6 . Such as figure 2 As shown, the yoke 1 has a rectangular shape in plan view. The magnet member 2 is arranged in contact with the yoke 1 . The magnet member 2 is magnetized in the order of S pole, N pole, and S pole on the upper surface along the X direction (one directi...

Embodiment approach 2

[0063] First, the structure of the speaker unit of this embodiment will be described.

[0064] Figure 12 It is a schematic perspective view of a yoke used in the speaker unit according to Embodiment 2 of the present invention. refer to Figure 12 Compared with Embodiment 1, the main difference of the speaker unit of this embodiment is that the engagement protrusion 7 of the yoke 1 has the bent portion 8 bent outward.

[0065] Figure 13 It is a schematic perspective view of the yoke and the magnet component of this embodiment. refer to Figure 13 The magnet member 2 composed of a plurality of magnetic bodies including a first magnetic body whose upper surface is magnetized to an N pole and a second magnetic body whose upper surface is magnetized to an S pole is arranged on the yoke 1 .

[0066] Figure 14 It is a schematic perspective view of the yoke and frame of embodiment. Figure 15 is along Figure 14 A brief sectional view of line XV-XV. refer to Figure 14 an...

Embodiment approach 3

[0073] First, the structure of the speaker unit of this embodiment will be described.

[0074] Figure 17 It is a schematic sectional view showing the structure of the speaker unit according to Embodiment 3 of the present invention. Figure 18 yes Figure 17 A simplified top view of the loudspeaker unit shown. It should be noted that, in Figure 18 In FIG. 2 , the vibration plate and the frame cover are not shown for easy observation. along Figure 18 A brief sectional view of line XVII-XVII is Figure 17 .

[0075] refer to Figure 17 and Figure 18 , compared with Embodiment 2, the main difference of the speaker unit of this embodiment is that the convex portion 6 of the yoke 1 has a cutout portion 9 in the center. Both end portions 22 of the magnet member 2 are not in contact with the convex portion 6 at portions adjacent to the notch portion 9 .

[0076] Figure 19 It is a schematic perspective view of the yoke of this embodiment. refer to Figure 19 The yoke ...

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PUM

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Abstract

A speaker unit and a portable information terminal which are small-sized, thin, and output sound having high sound pressure. The speaker unit comprises: a yoke (1) having a rectangular outer shape in a plan view; a magnet member (2) provided on the yoke (1) and magnetized in such a manner that an N pole and S poles are arranged in one direction on the upper surface of the magnetic member; a coil (3) provided above the upper surface of the magnetic member (2) with a space therebetween; a vibration plate (4) mounted to the coil (3); and a frame (5) for supporting the vibration plate (4). Among the sides defining the rectangular outer shape of the yoke (1), the sides extending along the aforementioned direction are provided with engaging projections (7) for engaging the frame (5) and the yoke (1) with each other.

Description

technical field [0001] The present invention relates to a loudspeaker unit and a portable information terminal, in particular to a miniaturized and thinned loudspeaker unit and a portable information terminal. Background technique [0002] The speaker unit is used in portable information terminals such as mobile phones, DSC (Digital Still Camera), PDA (Personal Digital Assistants), and PC (Personal Computer). It should be noted that, here, the speaker unit includes a so-called speaker and a receiver. [0003] In order to achieve miniaturization and thinning, an electroacoustic transducer (speaker unit) having a flat coil (horizontal type coil) in which the number of stacked coils in the width direction is larger than the number of stacked coils in the thickness direction has been proposed. (For example, refer to Japanese Patent No. 3213521: Patent Document 1). [0004] Patent Document 1: Japanese Patent No. 3213521 [0005] In recent years, portable information terminals ...

Claims

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Application Information

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IPC IPC(8): H04R9/02H04R9/04
CPCH04R9/025H04R2499/11
Inventor 丸上贵史
Owner SANYO ELECTRIC CO LTD
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